Sodium Thiosulfate Is Used Almost Exclusively to Titrate

question 10

Multiple Choice

Sodium thiosulfate is used almost exclusively to titrate .Which of the following is NOT true for sodium thiosulfate titrant?

• A)In neutral or acidic solution,triiodide oxidizes thiosulfate to tetrathionate.
• B)One mole of Is equivalent to two moles of I₂.
• C)In basic solution, Disproportionates to I⁻ and HOI,which can oxidize To )
• D)Sodium thiosulfate is standardized with freshly made Solution prepared from KIO₃ and KI.
• E)Dissolved CO₂ and metal ion catalyzed atmospheric oxidation of thiosulfate decreases the concentration of prepared thiosulfate solution.

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Definitions:

Semiannually

Occurring twice a year; a term often used in finance to indicate payments or calculations made every six months.

Market Rate

The prevailing interest rate available in the market for loans or deposits, subject to fluctuation based on demand, supply, and governmental policy.

Callable Bond

A callable bond is a type of bond that gives the issuer the right to repay the bond before its maturity date.

Call Provision

A clause in a bond or other fixed-income instrument that allows the issuer to repurchase and retire the debt before the scheduled maturity date.